Issue 03/01 2 Installation
MICROMASTER 411 & COMBIMASTER 411 Operating Instructions
6SE6400-5CA00-0BP0
33
2.5 Electrical Installation

WARNING
This equipment must be grounded.
♦ To ensure the safe operation of the equipment, it must be installed and
commissioned by qualified personnel in full compliance with the warnings laid
down in these operating instructions.
♦ Take particular note of the general and regional installation and safety
regulations regarding work on dangerous voltage installations (e.g. EN
50178), as well as the relevant regulations regarding the correct use of tools
and personal protective gear.
♦ Never use high voltage insulation test equipment on cables connected to the
inverter.
♦ Power supply and motor terminals can carry dangerous voltages even if the
inverter is inoperative; wait 5 minutes to allow the unit to discharge after
switching off before carrying out any installation work.
CAUTION
The control and power supply cables must be laid separately. Do not feed them
through the same cable conduit/trunking.

2.5.1 General

WARNING
The inverter must always be grounded. If the inverter is not grounded correctly,
extremely dangerous conditions may arise within the inverter which could prove
potentially fatal.

Operation with Residual Current Device

If an RCD (also referred to as ELCB or RCCB) is fitted, the MICROMASTER 411
Inverters will operate without nuisance tripping, provided that:
A type B RCD is used.
The trip limit of the RCD is 300 mA.
The neutral of the supply is grounded.
Only one inverter is supplied from each RCD.

Operation with long cables

All inverters will operate at full specification with cable lengths of 5 m.